Mongodb – req.body undefined in postman form-data but able to get in raw json

app.js

const express = require('express');
const app = express();
const hostname = '127.0.0.1';
const port = 3000;
const path = require('path');

const bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.urlencoded({ extended: false }));
app.use(express.json());

app.use('/products', require('./Routes/products.js'));

// Set EJS as templating engine 
app.set("view engine", "ejs");

app.listen(port, () => {
  console.log(`Listening to http://${hostname}:${port}`);
});

module.exports = app;

product.js

const express = require('express');
const router = express.Router();
const path = require('path');
const Product = require('../Models/product.js')

// Post
router.post('/', async (req, res) => {
    console.log('req.b: ', req.body);
    const product = new Product ({
        name: req.body.name,
        theme: req.body.theme,
        price: req.body.price,
        size: req.body.size,
        amount: req.body.amount
    });
    try {
        const savedProduct = await product.save();
        res.json(savedProduct);
    }catch (err) {
        res.json({ message:err })
    }
})

I’m getting a undefined req.body when i try to send data on postman using body form-data and i’m able to get it when I use raw json only. Am I missing something which doesn’t allow me to get the form data?